login
A176702
Triangle T(n,k) read by rows. A051731(n,k)-A051731(n,k+1).
3
1, 0, 1, 1, -1, 1, 0, 1, -1, 1, 1, 0, 0, -1, 1, 0, 0, 1, 0, -1, 1, 1, 0, 0, 0, 0, -1, 1, 0, 1, -1, 1, 0, 0, -1, 1, 1, -1, 1, 0, 0, 0, 0, -1, 1, 0, 1, 0, -1, 1, 0, 0, 0, -1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, -1, 1, 0, 0, 0, 1, -1, 1, 0, 0, 0, 0, -1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1, 1, 0, 1, 0, 0, 0, -1
OFFSET
1,1
COMMENTS
Matrix inverse of A134541.
The subsequence of A180430 beginning from the second column, divided by 2, equals this sequence. [From Mats Granvik, Sep 04 2010]
EXAMPLE
Triangle begins:
1
0...1
1..-1...1
0...1..-1...1
1...0...0..-1...1
0...0...1...0..-1...1
1...0...0...0...0..-1...1
0...1..-1...1...0...0..-1...1
1..-1...1...0...0...0...0..-1...1
0...1...0..-1...1...0...0...0..-1...1
1...0...0...0...0...0...0...0...0..-1...1
0...0...0...1..-1...1...0...0...0...0..-1...1
CROSSREFS
Cf. A176702*A000012=A051731. Row sums equals A000012.
Sequence in context: A285430 A284368 A287725 * A188038 A275694 A267922
KEYWORD
sign,tabl
AUTHOR
Mats Granvik, Gary W. Adamson, Apr 24 2010
STATUS
approved